NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Sat, Jul 4, 2026 at 3:44:15 am CDT

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Heat Advisory

Today’s Outlook

Tonight’s Outlook

Sunday's Outlook

Heat Risk

A Heat Advisory is now in effect for Harris County from 11 AM this morning through 7 PM this evening. The combination of heat and humidity will cause heat stress for those without adequate cooling and hydration. Practice heat safety if spending time outdoors. Do not leave pets or children unattended in vehicles. Ensure your vehicles are locked so that a child does not gain access and become trapped. Visit heat.gov/heat-safety/ for tips.

Patchy fog this morning will give way to another hot and humid day as high temps climb into the mid to upper 90s for most. Heat indices top out in the 100-109° range. There is a low chance (~20%) for showers and thunderstorms this afternoon.

Tonight looks to feature mostly clear skies along with warm and muggy conditions. Lows will settle into the mid 70s to low 80s (closer to the coast). There is a low chance for patchy fog around sunrise.

More of the same is in store on Sunday. Hot and humid conditions continue with highs generally in the mid 90s along with heat indices from 100-108°. There is a low chance for showers and storms with the greatest chances closer to the TX/LA border.

The majority of Southeast Texas will experience a Moderate to Major Heat Risk over the holiday weekend. The combination of heat and humidity will cause heat stress for those without adequate cooling and hydration. Practice heat safety if spending time outdoors. Do not leave pets or children unattended in vehicles. Ensure your vehicles are locked so that a child does not gain access and become trapped. Visit heat.gov/heat-safety/ for tips.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Bryan	03:15	Clear	10	79	74	85	S 6	-	30.04
College Station	02:53	Clear	10	78	74	87	S 6	-	30.02
Caldwell	02:55	Clear	10	78	73	83	S 6	-	30.04
Huntsville	02:53	Clear	10	78	74	87	SSW 6	-	30.03
Navasota	03:15	Clear	10	76	76	100	SSE 3	-	30.01
Brenham	03:15	Clear	10	78	74	90	SSW 3	-	30.02
Conroe	02:53	Clear	10	80	76	87	SSW 5	-	30.03
Cleveland	03:15	Clear	10				CALM	-	30.03
Liberty	03:15	Mist	6	77	77	100	CALM	-	30.01
Columbus	02:55	Clear	10	76	75	95	CALM	-	30.04
Spring	02:53	Clear	9	76	75	97	S 3	-	30.02
Houston Intercontinental Aprt	02:53	Mostly Clear	10	81	77	87	S 5	-	30.02
Katy/Brookshire	03:15	Mist	5	78	77	94	CALM	-	30.03
Texas Medical Center Heliport	03:15	Clear	10	80	77	88	VRB 5	-	30.01
Sugar Land	02:53	Clear	10	77	76	96	S 5	-	30.02
Houston Hobby Airport	02:53	Partly Cloudy	10	79	76	90	SSW 3	-	30.01
Arcola/Sienna	03:15	Clear	7	77	74	90	CALM	-	30.03
Pearland	02:53	Clear	9	78	75	90	CALM	-	30.03
Ellington Field	02:54	Clear	10	80	77	88	CALM	-	30.01
La Porte	03:15	Clear	10	78	75	88	CALM	-	30.03
Angleton/Lake Jackson	02:53	Mostly Clear	8	76	75	97	CALM	-	30.02
Galveston	02:52	Mostly Clear	10	83	77	82	SW 6	92 [HI]	30.03
Bay City	03:15	Mist	3	76	76	100	CALM	-	29.97
Palacios	02:53	Mostly Clear	10	83	76	79	S 9	91 [HI]	30.00
Rig 20 Miles SE of Matagorda	03:20		10	84	78	83	S 16	95 [HI]	30.04

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